To Epicurus succeeded, in the leadership of his school, Hermachus, Polystratus, Dionysius, Basilides, and others, ten in number, down to the age of Augustus. Among Roman Epicureans, Lucretius (95--51 B.C.) is the most important, his poem (De Rerum Natura), being the completest account of the system that exists. Other distinguished followers were Horace, Atticus, and Lacian. In modern times, Pierre Gassendi (1592--1655) revived the doctrines of Epicurus, and in 1647 published his 'Syntagma Philosophiae Epicuri,' and a Life of Epicurus. The reputation of Gassendi, in his life time, rested chiefly upon his physical theories; but his influence was much felt as a Christian upholder of Epicureanism. Gassendi was at one time in orders as a Roman Catholic, and professor of theology and philosophy. He established an Epicurean school in France, among the disciples of which were, Moliere, Saint Evremond, Count de Grammont, the Duke of Rochefoncalt, Fontenelle, and Voltaire. The standard of Virtue and Vice is referred by Epicurus to pleasure and pain. Pain is the only evil, Pleasure is the only good. Virtue is no end in itself, to be sought: Vice is no end in itself, to be avoided. The motive for cultivating Virtue and banishing Vice arises from the consequences of each, as the means of multiplying pleasures and averting or lessening pains. But to the attainment of this purpose, the complete supremacy of Reason is indispensable; in order that we may take a right comparative measure of the varieties of pleasure and pain, and pursue the course that promises the least amount of suffering.[12] In all ethical theories that make happiness the supreme object of pursuit, the position of virtue depends entirely upon the theory of what constitutes happiness. Now, Epicurus (herein differing from the Stoics, as well as Aristotle), did not recognize Happiness as anything but freedom from pain and enjoyment of pleasure. It is essential, however, to understand, how Epicurus conceived pleasure and pain, and what is the Epicurean scale of pleasures and pains, graduated as objects of reasonable desire or aversion? It is a great error to suppose that, in making pleasure the standard of virtue, Epicurus had in view that elaborate and studied gratification of the sensual appetites that we associate with the word _Epicurean_. Epicurus declares--'When we say that pleasure is the end of life, we do not mean the pleasures of the debauchee or the sensualist, as some from ignorance or from malignity represent, but freedom of the body from pain, and of the soul from anxiety. For it is not continuous drinkings and revellings, nor the society of women, nor rare viands, and other luxuries of the table, that constitute a pleasant life, but sober contemplation, such as searches out the grounds of choice and avoidance, and banishes those chimeras that harass the mind.